Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 102,967	$ 90,961
Less: Loss from discontinued operations, net of tax	(998)	(445)
Net income from continuing operations	103,965	91,406
Adjustments to reconcile net income from continuing operations to net cash provided by operating activities:
Depreciation and amortization	127,433	109,689
Amortization of debt issuance costs	4,333	4,936
Provision for bad debt and claim losses	11,064	6,328
Share-based compensation	29,859	26,419
Excess tax benefit related to stock options	(2,352)	(6,284)
Equity in earnings of affiliates, net of taxes	(595)	(11,931)
Gain on sale of property and equipment	(21)	(91)
Deferred income tax	10,283	(1,713)
Loss on early extinguishment of debt and other, net	17,088	3,494
Change in operating assets and liabilities, net of acquisitions:
Accounts receivable	(36,737)	(23,570)
Prepaid expenses and other current assets	(8,671)	3,420
Accounts payable and accrued expenses	(3,393)	(8,392)
Deferred revenue	35,814	56,373
Income taxes	32,981	2,072
Dividends received from investments in affiliates	8,773	26,516
Other assets and other liabilities	(12,550)	(19,008)
Net cash provided by operating activities - continuing operations	317,274	259,664
Net cash used in operating activities - discontinued operations	(468)	(7,584)
Total cash provided by operating activities	316,806	252,080
Cash flows from investing activities:
Purchase of subsidiary shares from noncontrolling interests	(18,023)	0
Purchases of property and equipment	(35,156)	(30,009)
Purchases of capitalized data and other intangible assets	(27,212)	(27,706)
Cash paid for acquisitions, net of cash acquired	(396,816)	(119,346)
Purchases of investments	(3,366)	(3,748)
Proceeds from sale of property and equipment	21	94
Proceeds from sale of investments	2,451	0
Change in restricted cash	1,990	1,496
Net cash used in investing activities - continuing operations	(476,111)	(179,219)
Net cash provided by investing activities - discontinued operations	0	0
Total cash used in investing activities	(476,111)	(179,219)
Cash flows from financing activities:
Proceeds from long-term debt	915,000	114,375
Debt issuance costs	(6,314)	(6,452)
Repayment of long-term debt	(647,286)	(46,999)
Debt extinguishment premium	(14,246)	0
Proceeds from issuance of shares in connection with share-based compensation	13,119	19,554
Tax withholdings related to net share settlements	(9,544)	(14,425)
Shares repurchased and retired	(112,961)	(97,430)
Excess tax benefit related to stock options	2,352	6,284
Net cash provided by/(used in) financing activities - continuing operations	140,120	(25,093)
Net cash provided by financing activities - discontinued operations	0	0
Total cash provided by/(used in) financing activities	140,120	(25,093)
Effect of exchange rate on cash	(890)	6,757
Net change in cash and cash equivalents	(20,075)	54,525
Cash and cash equivalents at beginning of period	99,090	104,677
Less: Change in cash and cash equivalents - discontinued operations	(468)	(7,584)
Plus: Cash swept to discontinued operations	(468)	(8,118)
Cash and cash equivalents at end of period	79,015	158,668
Supplemental disclosures of cash flow information:
Cash paid for interest	45,075	40,968
Cash paid for income taxes	12,633	40,946
Cash refunds from income taxes	489	3,559
Non-cash investing activities:
Capital expenditures included in accounts payable and accrued liabilities	$ 4,105	$ 5,353